WO2020132957A1 - 一种输液控制系统 - Google Patents

一种输液控制系统 Download PDF

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Publication number
WO2020132957A1
WO2020132957A1 PCT/CN2018/123963 CN2018123963W WO2020132957A1 WO 2020132957 A1 WO2020132957 A1 WO 2020132957A1 CN 2018123963 W CN2018123963 W CN 2018123963W WO 2020132957 A1 WO2020132957 A1 WO 2020132957A1
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Prior art keywords
infusion
maintenance
control system
tube
maintenance liquid
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PCT/CN2018/123963
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English (en)
French (fr)
Inventor
曹亮
徐志华
顾维立
郭伟伟
杜伯祥
王颖
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曹亮
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Application filed by 曹亮 filed Critical 曹亮
Priority to ZA2020/03750A priority Critical patent/ZA202003750B/en
Publication of WO2020132957A1 publication Critical patent/WO2020132957A1/zh

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16877—Adjusting flow; Devices for setting a flow rate
    • A61M5/16881—Regulating valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16831—Monitoring, detecting, signalling or eliminating infusion flow anomalies
    • A61M5/16854—Monitoring, detecting, signalling or eliminating infusion flow anomalies by monitoring line pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/18—General characteristics of the apparatus with alarm

Definitions

  • the invention relates to the technical field of medical infusion control, more specifically, it relates to an infusion control system.
  • infusions or micropumps are often used to inject certain drugs into human veins.
  • Liquid or micropumps need to be connected with intravenous needles with "three links".
  • the clinical use of the three links has the following hidden dangers:
  • Drugs injected by micropumps are often drugs that have a relatively severe impact on human physiological functions (such as booster drugs or vasodilators).
  • the micropump can control the speed of the drug into the human body to a very precise dose, which can be injected into the human body from a few to several milliliters per hour.
  • Infusion in critically ill patients often lasts from 24 hours to several days.
  • the micro pump continues to inject the medicine, so that the medicine will accumulate through the three-way valve into the infusion tube or medicine bag of the maintenance solution.
  • the medicine flowing backward into the infusion bag will be injected into the human body in a short time, and the medicine flowing backward into the infusion bag may have accumulated
  • the dosage of the drug per minute injected into the human body may increase many times, causing the patient's vital signs to fluctuate violently, causing damage to the human body and even leading to the death of the patient.
  • the object of the present invention is to provide an infusion control system, which is designed to maintain a path under any circumstances, which can quickly realize the dressing change and avoid the backflow caused by the liquid difference of different medicine bags
  • an infusion control system which is designed to maintain a path under any circumstances, which can quickly realize the dressing change and avoid the backflow caused by the liquid difference of different medicine bags
  • the present invention provides the following technical solutions:
  • An infusion control system includes a liquid soft bag, an infusion set, a medicated tube, and a three-way tube.
  • the liquid soft bag is threadedly connected to the infusion set.
  • the three-way tube is connected in series at the top of the infusion set.
  • the three-way tube includes A first maintenance liquid connector, a second maintenance liquid connector and a rotary switch, and an infusion needle connector, the first connection of the first maintenance liquid connector and the three-way pipe is provided with a first maintenance liquid inlet, the second maintenance liquid connector and the three A second maintenance liquid inlet is provided at the second connection of the through pipe, and the rotary switch is used to control the opening and closing of the first maintenance liquid inlet or the second maintenance liquid inlet through a rotating state.
  • the liquid soft bag is screwed to the infusion set, and the three-way pipe is connected in series at the upper part of the infusion set, and includes a first maintenance liquid connector, a second maintenance liquid connector and a rotary switch, and an infusion needle connector through the three-way tube , And through the rotary state through the rotary switch, to prevent the liquid from flowing back while controlling the opening and closing of the first maintenance liquid inlet or the second maintenance liquid inlet. Therefore, by applying the embodiment of the present invention, the opening and closing of the pipeline ports corresponding to the first maintenance liquid inlet, the second maintenance liquid inlet, and the dosing tube can be achieved by rotating the switch. In any case, maintaining a passage can be quickly achieved The medicine is changed and the backflow caused by the liquid difference of different medicine bags is avoided.
  • first maintenance fluid inlet and the second maintenance fluid inlet are provided with a unidirectionally opened valve.
  • the bottom of the soft liquid bag is provided with a catheter, and the lower end of the catheter is provided with a thread adapted to the upper end of the infusion set.
  • the lower end of the tube is provided with a thread adapted to the upper end of the infusion set to facilitate the connection of the catheter and improve the convenience of catheter connection.
  • the lower part of the catheter, the upper part of the infusion set, and the upper part of the dosing tube are respectively provided with a pair of convex corrugations, the convex corrugations are arranged axially along the outer wall of the tube, and the two convex corrugations are located on opposite sides of the tube body.
  • the configuration of the convex corrugated is conducive to thread connection and avoids slipping.
  • valve is a latex valve.
  • the valve is automatically opened when the liquid is squeezed during the infusion; the valve is automatically closed after the infusion is completed, and the anti-backflow function is effectively achieved. Therefore, by providing unidirectionally opened valves at the first maintenance fluid inlet and the second maintenance fluid inlet, the backflow of the medical fluid is prevented.
  • valve is located outside the liquid outlet of the three-way pipe.
  • a valve is provided outside the liquid outlet of the three-way pipe, so as to reduce the pressure on the valve during use and improve the service life of the valve.
  • valve is located between the first maintenance fluid inlet and the rotary switch, and between the first maintenance fluid inlet and the rotary switch.
  • the outer wall of the infusion needle joint of the three-way pipe is sleeved with an anti-shedding screw, and each joint end of the three-way pipe is provided with a sealing screw cap.
  • the outer wall of the infusion needle connector is provided with an anti-shedding screw, and each joint end of the three-way pipe is provided with a sealing screw cap to prevent the infusion needle from falling off, which is convenient for patients with unstable medical conditions or infants. .
  • a waterproof gas-permeable membrane and a filter membrane are sequentially arranged from the outside to the inside.
  • FIG. 1 is a schematic structural diagram of an infusion control system according to an embodiment provided by the present invention.
  • FIG. 2 is a schematic structural diagram of an implementation of a three-way pipe according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of another implementation structure of a three-way pipe according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of an infusion control system according to another embodiment of the present invention.
  • FIG. 5 is a schematic diagram of the structure of the convex corrugation provided by the present invention.
  • FIG. 6 is a schematic diagram of the structure of the gas permeable membrane and the filter membrane provided by the present invention.
  • an infusion control system includes a liquid soft bag 1, an infusion set 2, a dosing tube 3, and a three-way tube 5.
  • the liquid soft bag 1 is screwed to the infusion set 2 and the three-way tube 5 Connected in series on the upper part of the infusion set 2, the three-way pipe 5 includes a first maintenance liquid joint 51, a second maintenance liquid joint 52 and a rotary switch 53 and an infusion needle joint 54.
  • the first maintenance liquid joint 51 is first connected to the three-way pipe 5
  • a first maintenance liquid inlet 55 is provided at the location
  • a second maintenance liquid inlet 52 is connected to the tee pipe 5 at the second connection
  • a second maintenance liquid inlet 56 is provided
  • the rotary switch 53 is used to control the first maintenance liquid inlet 55 or The second maintenance liquid inlet 56 is opened and closed.
  • the liquid soft bag 1 is screwed to the infusion set 2, the three-way tube 5 is connected in series to the upper portion of the infusion set 2, and the dosing tube 3 and the infusion set 2 are connected by a matching interface for dosing treatment.
  • the infusion set 2 is connected to the patient and belongs to the patient end. Therefore, the infusion set 2 can be connected to the infusion set 2 through the three-way tube 5 to control whether the infusion set 2 inputs medicine into the patient.
  • the liquid soft bag 1 is screw-connected to the infusion set 2
  • the three-way pipe 5 is connected in series to the upper part of the infusion set 2, and includes a first maintenance liquid joint 51, a second maintenance liquid joint 52 and a three-way pipe 5
  • the rotary switch 53 and an infusion needle connector 54 are used to control the opening and closing of the first maintenance liquid inlet 55 or the second maintenance liquid inlet 56 through the rotation state through the rotation switch 53.
  • FIG. 3 which is a cross-sectional view of the infusion control system
  • the rotation position of the rotary switch 53 closes the infusion needle connector 54 so that no liquid can flow into the pipeline of the infusion needle connector 54.
  • the first maintenance liquid connector 51 and the first maintenance liquid inlet 55 corresponding to the three-way pipe 5 and the second maintenance liquid inlet 56 corresponding to the second maintenance liquid connector 52 form a smooth circuit. Therefore, it can be applied to open the inlet of the infusion needle connector 54 corresponding to the rotary switch 53 in the process of adding medicine, and close it after use.
  • the liquid soft bag 1 when the liquid soft bag 1 is connected to the first maintenance liquid inlet 55 and the infusion set 2 is connected to the second maintenance liquid inlet 56, the liquid soft bag 1 is formed by the second maintenance liquid inlet 56 corresponding to the second maintenance liquid connector 52 To reach the end of the infusion set 2 connected to the patient. Therefore, it can be seen that the first maintenance liquid inlet 55 or the second maintenance liquid inlet 56 can be quickly opened and closed by the rotary switch, which is convenient for the addition and replacement of medicines.
  • the opening and closing of the corresponding pipe ports of the first maintenance liquid inlet, the second maintenance liquid inlet, and the dosing tube are realized by rotating the switch at the same time, in any case, maintaining a passage can be Quickly realize the dressing change and avoid the backflow caused by the liquid difference of different medicine bags.
  • the first maintenance fluid inlet 55 and the second maintenance fluid inlet 56 are provided with a unidirectionally opened valve. It should be noted that when infusion is performed, the valve is automatically opened after being squeezed by the liquid; after the infusion is completed, the valve is automatically closed, which effectively realizes the function of preventing backflow. Therefore, by providing one-way open valves at the first maintenance liquid inlet 55 and the second maintenance liquid inlet 56, the medicine liquid is prevented from flowing backward.
  • a catheter 11 is provided at the bottom of the liquid soft bag 1, and the lower end of the catheter 11 is provided with a screw thread adapted to the upper end of the infusion set 2. Therefore, the lower end of the tube can be provided with a screw thread adapted to the upper end of the infusion set 2 to facilitate the connection of the catheter and improve the convenience of catheter connection.
  • the catheter 11 is provided with a catheter clamp. Convenient to connect and disconnect the catheter.
  • the screw connection is likely to cause problems such as slippage or connection misalignment.
  • the technical solution adopted in the embodiment of the present invention is that: a lower portion of the catheter 11, an upper portion of the infusion set 2, and an upper portion of the dosing tube 3 are provided with A ridge 31 and a second ridge, the first ridge 31 and the second ridge 32 are arranged axially along the outer wall of the tube, and the two ridges are located on opposite sides of the tube, see FIG. 5. Therefore, by applying the embodiment of the present invention, the slippage problem caused by the screw connection can be avoided by the arrangement of the corrugations.
  • the membrane filtration can be distinguished as ultrafiltration Membrane filtration, microporous membrane filtration and reverse osmosis membrane filtration can intercept different minimum particle sizes or molecular weights according to the membrane layer. Since the catheter 11 is a place where a person performs a drug change and touches it, it is easy to form residual medicine and finger contaminant residue.
  • the filtering principle that can be achieved through the chemical liquid filtration membrane can form further cleaning of the catheter interface.
  • the filtration function of the chemical liquid filtration membrane is existing and commonly used in the field of medical technology, it is not applied to the infusion control system and its corresponding infusion pipeline to form residues and pharmaceutical waste.
  • the further cleaning function of this has a very high clinical application value for ICU and other special patients with extremely high requirements for sanitation and dose matching accuracy, which can be obtained by those skilled in the art based on their filtering effect.
  • the micro-pump has an automatic alarm function, and other unidirectional valves or valves can also be used to replace the latex valve to prevent backflow.
  • the valve is selected as a latex valve.
  • the valve is located outside the liquid outlet of the three-way pipe 5.
  • a valve is provided outside the liquid outlet of the three-way pipe 5 to reduce the pressure on the valve during use and improve the service life of the valve.
  • valve and its connected infusion pipeline have a retrograde alarm for infusion.
  • the valve automatically opens, the infusion is completed, the squeezing force disappears, and the valve closes automatically.
  • the valve is under pressure in the reverse direction Because the fluid pressure cannot be released, the infusion pipeline around the valve will be squeezed to form a bloated tube, which will give a visual reminder to the medical staff.
  • the dual guarantee of safe use is achieved by the counterflow reminder of the valve and the surrounding pipeline and the setting of the rotary switch 53.
  • the valve is located between the first maintenance fluid inlet 55 and the rotary switch 53, and, the first maintenance Between the liquid inlet 55 and the rotary switch 53.
  • each joint end of the three-way pipe 5 is provided with a sealing screw cap, the outer wall of the infusion needle joint 54 is sleeved with an anti-falling screw, and each joint end of the three-way pipe 5
  • a sealing screw cap is provided to prevent the infusion needle from falling off, which is convenient for patients with unstable medical conditions or infants and young children.
  • the first maintenance liquid inlet 55 and the second maintenance liquid inlet 56 in this embodiment of the present invention are provided with a waterproof breathable membrane and a filter membrane in order from the outside to the inside, as shown in FIG. 6
  • the air permeable membrane is 551 and the filter membrane 552.
  • the breathable membrane is 551. It is made of a polymer waterproof material with corrosion resistance and non-adhesion.
  • the breathable membrane By placing the breathable membrane outside the filter membrane, it can be prevented
  • the particles generated after the filter membrane is damaged flow out of the first maintenance liquid inlet 55 to prevent it from drifting upward into the infusion set 2 or the medicine adding tube 3, which further reduces the entry of particles into the human body or pollutes the infusion set. Since the settings of the second maintenance liquid inlet 56 are the same, the embodiments of the present invention will not be repeated here.
  • the present invention has the following beneficial effects:
  • the three-way tube is connected in series to the upper part of the infusion set.
  • the three-way tube includes a first maintenance liquid connector, a second maintenance liquid connector and a rotary switch, and an infusion needle connector.
  • the switch is used to control the opening and closing of the first maintenance liquid inlet or the second maintenance liquid inlet while preventing the liquid from flowing backward through the rotating state. Therefore, applying the embodiment of the present invention, a three-way anti-backflow infusion is realized by a rotary switch.
  • the anti-backflow infusion tee to prevent the backflow of the medical liquid and the fall off at the joint is improved.
  • the lower end of the tube is provided with a thread adapted to the upper end of the infusion set to facilitate the connection of the catheter and improve the convenience of catheter connection.
  • the micro-pump When the pressure of the valve reaches a certain height, the micro-pump has an automatic alarm function, and other unidirectional valves or valves can also be used to replace the latex valve to prevent backflow.
  • a valve is provided outside the liquid outlet of the three-way pipe to reduce the pressure on the valve during use and improve the service life of the valve.

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Abstract

一种输液控制系统，包括液体软袋(1)、输液器(2)、加药管(3)、三通管(5)，液体软袋(1)与输液器(2)螺纹连接，三通管(5)串联在输液器(2)上部，三通管(5)包括第一维持液接头(51)、第二维持液接头(52)和旋转开关(53)以及一个输液针头接头(54)，第一维持液接头(51)与三通管(5)第一连接处设有第一维持液入口(55)，第二维持液接头(52)与三通管(5)第二连接处设有第二维持液入口(56)，旋转开关(53)通过旋转状态来控制第一维持液入口(55)或第二维持液入口(56)的敞开和关闭。该输液控制系统能够快速实现换药且避免了不同药物袋的液体差所造成的逆流。

Description

一种输液控制系统 技术领域
本发明涉及医用输液控制技术领域，更具体地说，它涉及一种输液控制系统。
背景技术
在危重病患者的临床治疗中，经常使用输液或微量泵将某些药物注入人体静脉。
液体或微量泵需要用“三通”进行连接静脉注射针头。临床上使用三通时有以下隐患：
一、微量泵注射的药物往往是一些对人体生理功能影响比较剧烈的药物(如升压药或血管扩张药)。微量泵可以使药物进入人体的速度控制到非常精确的剂量，每小时可以注入人体零点几至数毫升。危重病患者输液常持续24小时至数天之久。很多情况下可能在针头到三通之间出现阻塞，如在睡眠中有的患者可能因不自主活动(如翻身等)而将针头或输液管压闭、以及针头阻塞等情况发生。而此时微量泵仍持续地推注药物，这样药物会通过三通阀逆流入维持液的输液管或药袋而累积起来。当患者再次不自主翻身或由医护人员将压闭的输液管恢复流通后，就有可能使逆流入输液袋中的药物在短时间内注入人体，而逆流入输液袋中的药物有可能已累积了一段时间，在重新恢复流通后，药物注入人体的每分钟药物的剂量有可能增加了许多倍而导致患者生命体征剧烈波动，给人体造成损害甚至导致患者死亡。
二、即使不用微量泵，在一个患者的输液针头有时需要连接几种不同药物的输液袋进行输液，在这种情况下，也需要使用三通连接不同的输液袋及输液针头，由于不同的液体袋压力高低不同，会出现一种压力高的药物向压力低的药物袋逆流。
发明内容
针对现有技术存在的不足，本发明的目的在于提供一种输液控制系统，旨在在任何情况下，保持一个通路，可以快速实现换药和且避免了不同药物袋的液体差所造成的逆流，以解决现有技术中由于不同的液体袋压力高低不同，会出现一种压力高的药物向压力低的药物袋逆流的问题。
为实现上述目的，本发明提供了如下技术方案：
一种输液控制系统，包括液体软袋、输液器、加药管、三通管，所述液体软袋与输液器螺纹连接，所述三通管串联在输液器上部，所述三通管包括第一维持液接头、第二维持液接头和旋转开关以及一个输液针头接头，所述第一维持液接头与三通管第一连接处设有第一维持液入口，第二维持液接头与三通管第二连接处设有第二维持液入口，所述旋转开关通过旋转状态用来控制所述第一维持液入口或所述第二维持液入口的敞开和关闭。
通过采用上述技术方案，通过液体软袋与输液器螺纹连接，三通管串联在输液器上部，并通过三通管包括第一维持液接头、第二维持液接头和旋转开关以及一个输液针头接头，并通过旋转开关通过旋转状态，防止液体逆流的同时用来控制所述第一维持液入口或所述第二维持液入口的敞开和关闭。因此，应用本发明的实施例，通过旋转开关实现第一维持液入口、第二维持液入口和加药管所对应的管道口的敞开和关闭，在任何情况下，保持一个通路，可以快速实现换药和且避免了不同药物袋的液体差所造成的逆流。
进一步地，所述第一维持液入口和所述第二维持液入口设有单向开启的瓣膜。
通过采用上述技术方案，通过在第一维持液入口和第二维持液入口设有单向开启的瓣膜，提高以防止药液逆流及接头处脱落的防逆流输液三通。
进一步地，所述液体软袋底部设有导管，所述导管的下端设有与输液器的上端适配的螺纹。
通过采用上述技术方案，通过管的下端设有与输液器的上端适配的螺纹便于进行导管的连接，提高导管连接的便利性。
进一步地，所述导管的下部、输液器的上部、加药管的上部分别设有一对凸楞，所述凸楞沿管体外壁轴向设置，两个凸楞位于管体的对立面。
通过采用上述技术方案，凸楞的设置，利于螺纹连接，避免打滑。
进一步地，瓣膜为乳胶瓣膜。
通过采用上述技术方案，进行输液时，经液体挤压，瓣膜自动开启；输液完毕，瓣膜自动关闭，有效实现防逆流功能。因此，通过在第一维持液入口和第二维持液入口设有单向开启的瓣膜，以防止药液逆流。
进一步地，瓣膜位于所述三通管的液体输出口外侧。
通过采用上述技术方案，三通管的液体输出口外侧设置瓣膜，减少瓣膜在使用过程中所受到的压力，提高瓣膜的使用寿命。
进一步地，所述瓣膜位于所述第一维持液入口和旋转开关之间，以及，所述第一维持液入口和旋转开关之间。
通过采用上述技术方案，通过瓣膜的防逆流和旋转开关的设置实现安全使用的双重保障。
进一步地，所述三通管的输液针头接头外壁处套设有防脱落螺丝，所述三通管的各接头端设有封口螺丝帽。
通过采用上述技术方案，通过输液针头接头外壁处套设有防脱落螺丝，以及三通管的各接头端设有封口螺丝帽，防止输液针头脱落，便于在病人病情不稳定或者婴幼儿等人群使用。
进一步地，第一维持液入口和所述第二维持液入口之间均从外向内依次设有防水透气膜、过滤膜。
通过采用上述技术方案，通过在第一维持液入口和第二维持液入口之间均从外向内依次设有防水透气膜、过滤膜能够进一步减少颗粒物进入人体，提高透析的安全性。
附图说明
图1为本发明提供的一种实施方式的输液控制系统结构示意图；
图2为本发明实施例的三通管一种实现结构示意图；
图3是为本发明实施例的三通管另一种实现结构示意图；
图4为本发明提供的另一种实施方式的输液控制系统结构示意图；
图5为本发明提供的凸楞的结构示意图；
图6为本发明提供的透气膜为和过滤膜的结构示意图。
标记说明：
1、液体软袋；11、导管；2、输液器；3、加药管；5、三通管；31、第一凸楞；32、第二凸楞；51、第一维持液接头；52、第二维持液接头；53、旋转开关；54、输液针头接头；55、第一维持液入口；56、第二维持液入口；551、透气膜为；552、过滤膜。
具体实施方式
实施例：
以下结合附图1-6对本发明作进一步详细说明。
如图1和图2所示，一种输液控制系统，包括液体软袋1、输液器2、加药管3、三通管5，液体软袋1与输液器2螺纹连接，三通管5串联在输液器2上部，三通管5包括第一维持液接头51、第二维持液接头52和旋转开关53以及一个输液针头接头54，第一维持液接头51与三通管5第一连接处设有第一维持液入口55，第二维持 液接头52与三通管5第二连接处设有第二维持液入口56，旋转开关53通过旋转状态用来控制第一维持液入口55或第二维持液入口56的敞开和关闭。
需要说明的是，液体软袋1与输液器2螺纹连接，三通管5串联在输液器2上部，加药管3与输液器2采用匹配的接口相连，用来进行加药处理。输液器2与病人相连，属于病人端，因此，通过三通管5与输液器2相连可以控制输液器2是否将药物输入病人体内。
本发明实施例中，通过液体软袋1与输液器2螺纹连接，三通管5串联在输液器2上部，并通过三通管5包括第一维持液接头51、第二维持液接头52和旋转开关53以及一个输液针头接头54，并通过旋转开关53通过旋转状态，控制第一维持液入口55或第二维持液入口56的敞开和关闭。
如图3所示，为输液控制系统的剖面图，旋转开关53旋转的位置实现了对输液针头接头54的封闭，从而使得输液针头接头54的管道内无法流入液体，另一方面可以理解的是，第一维持液接头51与三通管5所对应的第一维持液入口55，第二维持液接头52所对应的第二维持液入口56形成畅通回路。因此，可以应用在加药的过程中打开旋转开关53所对应的输液针头接头54入口，使用完毕进行关闭。例如，当液体软袋1与第一维持液入口55连接，输液器2与第二维持液入口56连接时，液体软袋1通过第二维持液接头52所对应的第二维持液入口56形成的通路到达连接病人的输液器2的那一端。因此，可见，通过旋转开关能够快速实现第一维持液入口55或第二维持液入口56的敞开和关闭，便于药物的添加和更换。
因此，应用本发明的实施例，同一时间通过旋转开关实现第一维持液入口、第二维持液入口和加药管所对应的管道口的敞开和关闭，在任何情况下，保持一个通路，可以快速实现换药和且避免了不同药物袋的液体差所造成的逆流。
本发明的优选实施例中，第一维持液入口55和第二维持液入口56设有单向开启的瓣膜。需要说明的是，进行输液时，经液体挤压，瓣膜自动开启；输液完毕，瓣膜自动关闭，有效实现防逆流功能。因此，通过在第一维持液入口55和第二维持液入口56设有单向开启的瓣膜，以防止药液逆流。
如图4所示，液体软袋1底部设有导管11，导管11的下端设有与输液器2的上端适配的螺纹。因此，可以通过管的下端设有与输液器2的上端适配的螺纹便于进行导管的连接，提高导管连接的便利性。
另一种具体实现方式中，导管11设有导管夹。便于进行导管的连接与断开。
另外，为了防止螺纹进行管道连接螺纹连接容易造成打滑或者连接错位的问题，本发明实施例采用的技术方案是：导管11的下部、输液器2的上部、加药管3的上部分别设有第一凸楞31和第二凸楞，第一凸楞31和第二凸楞32沿管体外壁轴向设置，两个凸楞位于管体的对立面，参见图5。因此，应用本发明的实施例，通过凸楞的设置可以避免螺纹连接造成的打滑问题。
另一方面，还可以在第一凸楞31和第二凸楞32上均设置药液过滤膜；根据药液过滤膜的制作工艺所形成的压力差为推动力，膜过滤可区分为超滤膜过滤、微孔膜过滤和逆渗透膜过滤，能够根据膜层所能截留不同的最小粒子尺寸或分子量大小。由于导管11为人员进行进行换药进行触碰的地方，容易形成残留药剂和手指污染物残留，通过药液过滤膜能够的过滤原理能够形成导管接口的进一步的清理。
需要说明的是，尽管药液过滤膜的过滤功能是现有的也是常应用于医疗技术领域的，但是并没有应用在输液控制系统及其对应的输液管道上进行设置形成对残留物和药剂垃圾的进一步清理功能，这对于卫生和药量配比精度需求极高的ICU和其他特殊病人具有非常高的 临床应用价值，非本领域技术人员根据其过滤作用可以进行联想可以得到的。
需要说明的是，通过瓣膜的压力达到一定高度微量泵有自动报警功能，也可以采用其他单向活瓣或阀门等代替乳胶瓣膜，以起到防逆流作用。
另外，为防止人员在第一维持液入口55和第二维持液入口56的地方，误操作其他物质进入流动的输液液体内造成输液受污染，因此，选择瓣膜为乳胶瓣膜。具体，本发明实施例中，瓣膜位于三通管5的液体输出口外侧。三通管5的液体输出口外侧设置瓣膜，减少瓣膜在使用过程中所受到的压力，提高瓣膜的使用寿命。
需要说明的是，瓣膜及其相连接的输液管道具有逆行报警进行输液时，正向时经液体挤压，瓣膜自动开启，输液完毕，挤压力消失瓣膜自动关闭，当瓣膜反向受压力时，由于液体压力无法释放，会对瓣膜周围的输液管道进行挤压形成管道臌胀，对医护人员进行视觉上的提醒。
为了进一步增强输液装置的安全性，通过瓣膜和周边管道的逆流提醒和旋转开关53的设置实现安全使用的双重保障，瓣膜位于第一维持液入口55和旋转开关53之间，以及，第一维持液入口55和旋转开关53之间。
本发明的一种具体实现中，为了防脱落螺丝，三通管5的各接头端设有封口螺丝帽，输液针头接头54外壁处套设有防脱落螺丝，以及三通管5的各接头端设有封口螺丝帽，防止输液针头脱落，便于在病人病情不稳定或者婴幼儿等人群使用。
为了进一步减少颗粒物进入人体，提高透析的安全性，本发明实施例中第一维持液入口55和第二维持液入口56均从外向内依次设有防水透气膜、过滤膜，如图6所示，以第一维持液入口55为例，透气膜为551、过滤膜552。需要和说明的是，过滤膜552的作用为进 行颗粒的过滤，透气膜为551选择具有耐腐蚀且不粘附的高分子防水材料制成，通过将透气膜设置在过滤膜的外部，能够防止过滤膜破损后产生的颗粒流出第一维持液入口55，避免其向上漂流进入输液器2或者加药管3中，进一步减少颗粒物进入人体或者污染输液器。针对第二维持液入口56的设置相同，本发明实施例在此不做赘述。
综上，本发明具有以下有益效果：
1、通过液体软袋与输液器螺纹连接，三通管串联在输液器上部，并通过三通管包括第一维持液接头、第二维持液接头和旋转开关以及一个输液针头接头，并通过旋转开关通过旋转状态，防止液体逆流的同时用来控制所述第一维持液入口或所述第二维持液入口的敞开和关闭。因此，应用本发明的实施例，通过旋转开关实现防逆流输液三通。
2、通过在第一维持液入口和第二维持液入口设有单向开启的瓣膜，提高以防止药液逆流及接头处脱落的防逆流输液三通。
3、通过管的下端设有与输液器的上端适配的螺纹便于进行导管的连接，提高导管连接的便利性。
4、通过瓣膜的压力达到一定高度微量泵有自动报警功能，也可以采用其他单向活瓣或阀门等代替乳胶瓣膜，以起到防逆流作用。
5、三通管的液体输出口外侧设置瓣膜，减少瓣膜在使用过程中所受到的压力，提高瓣膜的使用寿命。
本具体实施例仅仅是对本发明的解释，其并不是对本发明的限制，本领域技术人员在阅读完本说明书后可以根据需要对本实施例做出没有创造性贡献的修改，但只要在本发明的权利要求范围内都受到专利法的保护。

Claims (10)

  1. 一种输液控制系统，其特征在于：包括液体软袋(1)、输液器(2)、加药管(3)、三通管(5)，所述液体软袋(1)与输液器(2)螺纹连接，所述加药管(3)与所述输液器(2)采用匹配的接口相连，所述三通管(5)串联在输液器(2)上部，所述三通管(5)包括第一维持液接头(51)、第二维持液接头(52)和旋转开关(53)以及一个输液针头接头(54)，所述第一维持液接头(51)与三通管第一连接处设有第一维持液入口(55)，第二维持液接头(51)与三通管第二连接处设有第二维持液入口(56)，所述旋转开关(53)通过旋转状态用来控制所述第一维持液入口(55)或所述第二维持液入口(56)的敞开和关闭。
  2. 根据权利要求1所述的输液控制系统，其特征在于，所述第一维持液入口(55)和所述第二维持液入口(56)设有单向开启的瓣膜。
  3. 根据权利要求1所述的输液控制系统，其特征在于，所述液体软袋(1)底部设有导管(11)，所述导管(11)的下端设有与输液器(2)的上端适配的螺纹。
  4. 根据权利要求3所述的输液控制系统，其特征在于，所述导管(11)设有导管夹。
  5. 根据权利要求3或4所述的输液控制系统，其特征在于，所述导管(11)的下部、所述输液器(2)的上部、所述加药管(3)的上部分别设有一对凸楞，所述凸楞沿管体外壁轴向设置，两个凸楞位于管体的对立面。
  6. 根据权利要求2所述的输液控制系统，其特征在于，所述瓣膜为乳胶瓣膜。
  7. 根据权利要求2或6所述的输液控制系统，其特征在于，所述瓣膜位于所述三通管的液体输出口外侧。
  8. 根据权利要求7所述的输液控制系统，其特征在于，所述瓣 膜位于所述第一维持液入口(55)和旋转开关(53)之间，以及，所述第二维持液入口(56)和旋转开关(53)之间。
  9. 根据权利要求7所述的输液控制系统，其特征在于，所述三通管(5)的输液针头接头(54)外壁处套设有防脱落螺丝，所述三通管(5)的每一个接头端均设有封口螺丝帽。
  10. 根据权利要求1所述的输液控制系统，其特征在于，所述第一维持液入口(55)和所述第二维持液入口(56)之间均从外向内依次设有防水透气膜、过滤膜。
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